The inclusion of some events is up to debate, but three events are not included in the list for the following reasons :
WCG 2001 - CPL Winter 2001 was played at the same time and few premier teams attended.
CPL Summer 2005 - ESWC 2005 was played at the same time and was considered to have more premier teams.
IEM Season 1 - Only European teams were allowed to play.